(a) DNA and RNA are made up of nucleic acids. They are the vehicles of genetic inheritance. Building blocks of nucleic acids are called nucleotides. Each nucleotide consists of three parts: a sugar (ribose for RNA and deoxyribose for DNA), a phosphate, and a nitrogenous base. These nucleotides linked together with covalent bonds to form a sugar-phosphate backbone with extended nitrogenous bases.
NCERT Page-149 / N-111
Biomolecules
277752
Sugar-phosphate backbone in nucleic acid
1 is hydrophilic in nature.
2 is negatively charged.
3 shows polarity.
4 all of the above.
Explanation:
(d) The backbone is constructed from alternating ribose sugar and negatively charged phosphate molecules which are highly polar. Because the backbone is polar, it is hydrophilic which means that it likes to be immersed in water. The DNA is antiparallel means that the two strands of DNA have opposite chemical polarity, or stated another why their sugar- phosphate backbones run in opposite directions.
NCERT Page-151
Biomolecules
277753
A nucleotide is formed of
1 Purine, pyrimidine and phosphate
2 Purine, sugar and phosphate
3 Nitrogenous base, sugar and phosphate
4 Pyrimidine, sugar and phosphate
Explanation:
(c) The nucleic acid (DNA and RNA) are repeating units of nucleotides i.e. polynucleotides. Each nucleotide comprises of nitrogenous heterocyclic bases viz. purines or pyrimidines, pentose sugar and phosphoric acid.
NCERT Page-149 / N-111
Biomolecules
277754
The two polynucleotide chains in DNA are
1 Parallel
2 Antiparallel
3 Discontinuous
4 Semiconservative
Explanation:
(c) The two polynucleotide chains are anti-parallel to each other.
NCERT Page-151
Biomolecules
277755
Which of the following statements is correct?
1 Adenine pairs with thymine through one$\text{H}$-bond
2 Adenine pairs with thymine through three$\text{H}$-bonds
3 Adenine does not pair with thymine
4 Adenine pairs with thymine through two$\text{H}$-bonds
Explanation:
(d) Based on the observation of Erwin Chargaff that for a double stranded DNA, the ratios between Adenine and Thymine and Guanine and Cytosine are constant and equals one. Adenine pairs with thymine through two $\text{H}$-bonds i.e., $\text{A}=\text{T}$ and guanine pairs with cytosine with three $\text{H}$-bonds.
(a) DNA and RNA are made up of nucleic acids. They are the vehicles of genetic inheritance. Building blocks of nucleic acids are called nucleotides. Each nucleotide consists of three parts: a sugar (ribose for RNA and deoxyribose for DNA), a phosphate, and a nitrogenous base. These nucleotides linked together with covalent bonds to form a sugar-phosphate backbone with extended nitrogenous bases.
NCERT Page-149 / N-111
Biomolecules
277752
Sugar-phosphate backbone in nucleic acid
1 is hydrophilic in nature.
2 is negatively charged.
3 shows polarity.
4 all of the above.
Explanation:
(d) The backbone is constructed from alternating ribose sugar and negatively charged phosphate molecules which are highly polar. Because the backbone is polar, it is hydrophilic which means that it likes to be immersed in water. The DNA is antiparallel means that the two strands of DNA have opposite chemical polarity, or stated another why their sugar- phosphate backbones run in opposite directions.
NCERT Page-151
Biomolecules
277753
A nucleotide is formed of
1 Purine, pyrimidine and phosphate
2 Purine, sugar and phosphate
3 Nitrogenous base, sugar and phosphate
4 Pyrimidine, sugar and phosphate
Explanation:
(c) The nucleic acid (DNA and RNA) are repeating units of nucleotides i.e. polynucleotides. Each nucleotide comprises of nitrogenous heterocyclic bases viz. purines or pyrimidines, pentose sugar and phosphoric acid.
NCERT Page-149 / N-111
Biomolecules
277754
The two polynucleotide chains in DNA are
1 Parallel
2 Antiparallel
3 Discontinuous
4 Semiconservative
Explanation:
(c) The two polynucleotide chains are anti-parallel to each other.
NCERT Page-151
Biomolecules
277755
Which of the following statements is correct?
1 Adenine pairs with thymine through one$\text{H}$-bond
2 Adenine pairs with thymine through three$\text{H}$-bonds
3 Adenine does not pair with thymine
4 Adenine pairs with thymine through two$\text{H}$-bonds
Explanation:
(d) Based on the observation of Erwin Chargaff that for a double stranded DNA, the ratios between Adenine and Thymine and Guanine and Cytosine are constant and equals one. Adenine pairs with thymine through two $\text{H}$-bonds i.e., $\text{A}=\text{T}$ and guanine pairs with cytosine with three $\text{H}$-bonds.
(a) DNA and RNA are made up of nucleic acids. They are the vehicles of genetic inheritance. Building blocks of nucleic acids are called nucleotides. Each nucleotide consists of three parts: a sugar (ribose for RNA and deoxyribose for DNA), a phosphate, and a nitrogenous base. These nucleotides linked together with covalent bonds to form a sugar-phosphate backbone with extended nitrogenous bases.
NCERT Page-149 / N-111
Biomolecules
277752
Sugar-phosphate backbone in nucleic acid
1 is hydrophilic in nature.
2 is negatively charged.
3 shows polarity.
4 all of the above.
Explanation:
(d) The backbone is constructed from alternating ribose sugar and negatively charged phosphate molecules which are highly polar. Because the backbone is polar, it is hydrophilic which means that it likes to be immersed in water. The DNA is antiparallel means that the two strands of DNA have opposite chemical polarity, or stated another why their sugar- phosphate backbones run in opposite directions.
NCERT Page-151
Biomolecules
277753
A nucleotide is formed of
1 Purine, pyrimidine and phosphate
2 Purine, sugar and phosphate
3 Nitrogenous base, sugar and phosphate
4 Pyrimidine, sugar and phosphate
Explanation:
(c) The nucleic acid (DNA and RNA) are repeating units of nucleotides i.e. polynucleotides. Each nucleotide comprises of nitrogenous heterocyclic bases viz. purines or pyrimidines, pentose sugar and phosphoric acid.
NCERT Page-149 / N-111
Biomolecules
277754
The two polynucleotide chains in DNA are
1 Parallel
2 Antiparallel
3 Discontinuous
4 Semiconservative
Explanation:
(c) The two polynucleotide chains are anti-parallel to each other.
NCERT Page-151
Biomolecules
277755
Which of the following statements is correct?
1 Adenine pairs with thymine through one$\text{H}$-bond
2 Adenine pairs with thymine through three$\text{H}$-bonds
3 Adenine does not pair with thymine
4 Adenine pairs with thymine through two$\text{H}$-bonds
Explanation:
(d) Based on the observation of Erwin Chargaff that for a double stranded DNA, the ratios between Adenine and Thymine and Guanine and Cytosine are constant and equals one. Adenine pairs with thymine through two $\text{H}$-bonds i.e., $\text{A}=\text{T}$ and guanine pairs with cytosine with three $\text{H}$-bonds.
(a) DNA and RNA are made up of nucleic acids. They are the vehicles of genetic inheritance. Building blocks of nucleic acids are called nucleotides. Each nucleotide consists of three parts: a sugar (ribose for RNA and deoxyribose for DNA), a phosphate, and a nitrogenous base. These nucleotides linked together with covalent bonds to form a sugar-phosphate backbone with extended nitrogenous bases.
NCERT Page-149 / N-111
Biomolecules
277752
Sugar-phosphate backbone in nucleic acid
1 is hydrophilic in nature.
2 is negatively charged.
3 shows polarity.
4 all of the above.
Explanation:
(d) The backbone is constructed from alternating ribose sugar and negatively charged phosphate molecules which are highly polar. Because the backbone is polar, it is hydrophilic which means that it likes to be immersed in water. The DNA is antiparallel means that the two strands of DNA have opposite chemical polarity, or stated another why their sugar- phosphate backbones run in opposite directions.
NCERT Page-151
Biomolecules
277753
A nucleotide is formed of
1 Purine, pyrimidine and phosphate
2 Purine, sugar and phosphate
3 Nitrogenous base, sugar and phosphate
4 Pyrimidine, sugar and phosphate
Explanation:
(c) The nucleic acid (DNA and RNA) are repeating units of nucleotides i.e. polynucleotides. Each nucleotide comprises of nitrogenous heterocyclic bases viz. purines or pyrimidines, pentose sugar and phosphoric acid.
NCERT Page-149 / N-111
Biomolecules
277754
The two polynucleotide chains in DNA are
1 Parallel
2 Antiparallel
3 Discontinuous
4 Semiconservative
Explanation:
(c) The two polynucleotide chains are anti-parallel to each other.
NCERT Page-151
Biomolecules
277755
Which of the following statements is correct?
1 Adenine pairs with thymine through one$\text{H}$-bond
2 Adenine pairs with thymine through three$\text{H}$-bonds
3 Adenine does not pair with thymine
4 Adenine pairs with thymine through two$\text{H}$-bonds
Explanation:
(d) Based on the observation of Erwin Chargaff that for a double stranded DNA, the ratios between Adenine and Thymine and Guanine and Cytosine are constant and equals one. Adenine pairs with thymine through two $\text{H}$-bonds i.e., $\text{A}=\text{T}$ and guanine pairs with cytosine with three $\text{H}$-bonds.
(a) DNA and RNA are made up of nucleic acids. They are the vehicles of genetic inheritance. Building blocks of nucleic acids are called nucleotides. Each nucleotide consists of three parts: a sugar (ribose for RNA and deoxyribose for DNA), a phosphate, and a nitrogenous base. These nucleotides linked together with covalent bonds to form a sugar-phosphate backbone with extended nitrogenous bases.
NCERT Page-149 / N-111
Biomolecules
277752
Sugar-phosphate backbone in nucleic acid
1 is hydrophilic in nature.
2 is negatively charged.
3 shows polarity.
4 all of the above.
Explanation:
(d) The backbone is constructed from alternating ribose sugar and negatively charged phosphate molecules which are highly polar. Because the backbone is polar, it is hydrophilic which means that it likes to be immersed in water. The DNA is antiparallel means that the two strands of DNA have opposite chemical polarity, or stated another why their sugar- phosphate backbones run in opposite directions.
NCERT Page-151
Biomolecules
277753
A nucleotide is formed of
1 Purine, pyrimidine and phosphate
2 Purine, sugar and phosphate
3 Nitrogenous base, sugar and phosphate
4 Pyrimidine, sugar and phosphate
Explanation:
(c) The nucleic acid (DNA and RNA) are repeating units of nucleotides i.e. polynucleotides. Each nucleotide comprises of nitrogenous heterocyclic bases viz. purines or pyrimidines, pentose sugar and phosphoric acid.
NCERT Page-149 / N-111
Biomolecules
277754
The two polynucleotide chains in DNA are
1 Parallel
2 Antiparallel
3 Discontinuous
4 Semiconservative
Explanation:
(c) The two polynucleotide chains are anti-parallel to each other.
NCERT Page-151
Biomolecules
277755
Which of the following statements is correct?
1 Adenine pairs with thymine through one$\text{H}$-bond
2 Adenine pairs with thymine through three$\text{H}$-bonds
3 Adenine does not pair with thymine
4 Adenine pairs with thymine through two$\text{H}$-bonds
Explanation:
(d) Based on the observation of Erwin Chargaff that for a double stranded DNA, the ratios between Adenine and Thymine and Guanine and Cytosine are constant and equals one. Adenine pairs with thymine through two $\text{H}$-bonds i.e., $\text{A}=\text{T}$ and guanine pairs with cytosine with three $\text{H}$-bonds.
